11 OXO is the trademark name for adrenosterone. Adrenosterone is an adrenal androgen. “Adrenal androgen” means it is a hormone produced by the adrenal gland that is in the same general hormonal class as testosterone (another example of an adrenal androgen is DHEA).

On another forum I frequent, a few people have used it during a cut and said it's pretty decent.

You need a pretty high dosage which costs a bit but some people have found it worthwhile.. personally I wouldn't bother. I'm sure you'd get better results cutting from any of the PROVEN things out there like caffeine, ephedrine etc